#	OpenShot Video Editor is a program that creates, modifies, and edits video files.
#   Copyright (C) 2009  Jonathan Thomas
#
#	This file is part of OpenShot Video Editor (http://launchpad.net/openshot/).
#
#	OpenShot Video Editor is free software: you can redistribute it and/or modify
#	it under the terms of the GNU General Public License as published by
#	the Free Software Foundation, either version 3 of the License, or
#	(at your option) any later version.
#
#	OpenShot Video Editor is distributed in the hope that it will be useful,
#	but WITHOUT ANY WARRANTY; without even the implied warranty of
#	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#	GNU General Public License for more details.
#
#	You should have received a copy of the GNU General Public License
#	along with OpenShot Video Editor.  If not, see <http://www.gnu.org/licenses/>.


# Import Blender's python API.  This only works when the script is being
# run from the context of Blender.  Blender contains it's own version of Python
# with this library pre-installed.
import bpy

# Load a font
def load_font(font_path):
	""" Load a new TTF font into Blender, and return the font object """
	# get the original list of fonts (before we add a new one)
	original_fonts = bpy.data.fonts.keys()
	
	# load new font
	bpy.ops.font.open(filepath=font_path)
	
	# get the new list of fonts (after we added a new one)
	for font_name in bpy.data.fonts.keys():
		if font_name not in original_fonts:
			return bpy.data.fonts[font_name]
		
	# no new font was added
	return None

# Debug Info:
# ./blender -b test.blend -P demo.py
# -b = background mode
# -P = run a Python script within the context of the project file

# Init all of the variables needed by this script.  Because Blender executes
# this script, OpenShot will inject a dictionary of the required parameters
# before this script is executed.
params = {		
			'title' : 'Oh Yeah! OpenShot!',
			'extrude' : 0.1,
			'bevel_depth' : 0.02,
			'spacemode' : 'CENTER',
			'text_size' : 1.5,
			'width' : 1.0,
			'fontname' : 'Bfont',
			
			'color' : [0.8,0.8,0.8],
			'alpha' : 1.0,
			
			'output_path' : '/tmp/',
			'fps' : 24,
			'quality' : 90,
			'file_format' : 'PNG',
			'color_mode' : 'RGBA',
			'horizon_color' : [0.57, 0.57, 0.57],
			'resolution_x' : 1920,
			'resolution_y' : 1080,
			'resolution_percentage' : 100,
			'start_frame' : 20,
			'end_frame' : 25,
			'animation' : True,
		}

#INJECT_PARAMS_HERE

# The remainder of this script will modify the current Blender .blend project
# file, and adjust the settings.  The .blend file is specified in the XML file
# that defines this template in OpenShot.
#----------------------------------------------------------------------------

import math

#depart = {"title":"Paris", 
#		  "lat_deg": 48, "lat_min": 51, "lat_sec": 24, "lat_dir": "N",
#		  "lon_deg": 2, "lon_min": 21, "lon_sec": 7, "lon_dir": "E",
#		}
#
#arrive = {"title":"New York", 
#		  "lat_deg": 40, "lat_min": 42, "lat_sec": 51, "lat_dir": "N",
#		  "lon_deg": 74, "lon_min": 0, "lon_sec": 23, "lon_dir": "O",
#		}

depart = {
		  "lat_deg": params["depart_lat_deg"], "lat_min": params["depart_lat_min"], "lat_sec": params["depart_lat_sec"], "lat_dir": params["depart_lat_dir"],
		  "lon_deg": params["depart_lon_deg"], "lon_min": params["depart_lon_min"], "lon_sec": params["depart_lon_sec"], "lon_dir": params["depart_lon_dir"],
		}

arrive = {
		  "lat_deg": params["arrive_lat_deg"], "lat_min": params["arrive_lat_min"], "lat_sec": params["arrive_lat_sec"], "lat_dir": params["arrive_lat_dir"],
		  "lon_deg": params["arrive_lon_deg"], "lon_min": params["arrive_lon_min"], "lon_sec": params["arrive_lon_sec"], "lon_dir": params["arrive_lon_dir"],
		}

point_a = {}
point_b = {}
point_c = {}
point_d = {}

def get_latitude(direction, degrees, minutes, seconds):
	
	latitude = 0.0
	if direction == "N":
		# North of the equator
		latitude = -(degrees + minutes / 60.0 + seconds / 3600.0)
	else:
		# South of the equator
		latitude = degrees + minutes / 60.0 + seconds / 3600.0
		
	return latitude


def get_longitude(direction, degrees, minutes, seconds):

	longitude = 0.0
	if direction == "E":
		# North of the equator
		longitude = degrees + minutes / 60.0 + seconds / 3600.0
	else:
		# South of the equator
		longitude = - (degrees + minutes / 60.0 + seconds / 3600.0)
		
	return longitude

def check_longitude(depart_longitude, arrive_longitude):
	
	if -180 < (arrive_longitude - depart_longitude) and (arrive_longitude - depart_longitude) < 180:
		return depart_longitude
	else:
		if depart_longitude < 0:
			return depart_longitude + 360
		else:
			return depart_longitude - 360
		
		
# Calculate latitude / longitude for depart and arrive points
sphere_radius = 10.0
point_a["lat"] = get_latitude(depart["lat_dir"], depart["lat_deg"], depart["lat_min"], depart["lat_sec"])
point_a["lon"] = get_longitude(depart["lon_dir"], depart["lon_deg"], depart["lon_min"], depart["lon_sec"])
point_b["lat"] = get_latitude(arrive["lat_dir"], arrive["lat_deg"], arrive["lat_min"], arrive["lat_sec"])
point_b["lon"] = get_longitude(arrive["lon_dir"], arrive["lon_deg"], arrive["lon_min"], arrive["lon_sec"])
point_a["lon_Z"] = check_longitude(point_a["lon"], point_b["lon"])
point_b["lon_Z"] = point_b["lon"]

point_a["x"] = sphere_radius * math.cos(math.radians(point_a["lat"])) * math.sin(math.radians(point_a["lon"]))
point_b["x"] = sphere_radius * math.cos(math.radians(point_b["lat"])) * math.sin(math.radians(point_b["lon"]))
point_a["y"] = sphere_radius * math.cos(math.radians(point_a["lat"])) * math.cos(math.radians(point_a["lon"]))
point_b["y"] = sphere_radius * math.cos(math.radians(point_b["lat"])) * math.cos(math.radians(point_b["lon"]))
point_a["z"] = sphere_radius * math.sin(math.radians(point_a["lat"]))
point_b["z"] = sphere_radius * math.sin(math.radians(point_b["lat"]))

# Get angle between A & B points
ab_angle_radians = math.acos((point_a["x"] * point_b["x"] + point_a["y"] * point_b["y"] + point_a["z"] * point_b["z"]) / (sphere_radius * sphere_radius))
ab_angle_degrees = ab_angle_radians * 180 / math.pi

# calculate points C & D
point_c["lat"] = point_a["lat"] + 0.25 * (point_b["lat"] - point_a["lat"])
point_c["lon"] = point_a["lon_Z"] + 0.25 * (point_b["lon_Z"] - point_a["lon_Z"])
point_d["lat"] = point_a["lat"] + 0.75 * (point_b["lat"] - point_a["lat"])
point_d["lon"] = point_a["lon_Z"] + 0.75 * (point_b["lon_Z"] - point_a["lon_Z"])

# radius of CD line segment
location_CD = (sphere_radius + 1.0) / math.cos(ab_angle_radians / 4.0)

print("EmptyPointA Transform Rotation: Y= %f Z= %f" % (point_a["lat"], point_a["lon_Z"]))
print("EmptyPointB Transform Rotation: Y= %f Z= %f" % (point_b["lat"], point_b["lon_Z"]))
print("EmptyPointC Transform Rotation: Y= %f Z= %f" % (point_c["lat"], point_c["lon"]))
print("EmptyPointD Transform Rotation: Y= %f Z= %f" % (point_d["lat"], point_d["lon"]))
print("EmptyPointC.001 Transform Location: X= %f" % location_CD)
print("EmptyPointD.001 Transform Location: X= %f" % location_CD)
print("EmptyCam Frame 20 ->Transform Rotation: Y= %f Z= %f  And press I key" % (point_a["lat"], point_a["lon_Z"]))
print("EmptyCam Frame 80 ->Transform Rotation: Y= %f Z= %f  And press I key" % (point_b["lat"], point_b["lon_Z"]))

# Set Blender properties
bpy.data.objects["EmptyPointA"].rotation_euler = (0.0, math.radians(point_a["lat"]), math.radians(point_a["lon_Z"]))
bpy.data.objects["EmptyPointB"].rotation_euler = (0.0, math.radians(point_b["lat"]), math.radians(point_b["lon_Z"]))
bpy.data.objects["EmptyPointC"].rotation_euler = (0.0, math.radians(point_c["lat"]), math.radians(point_c["lon"]))
bpy.data.objects["EmptyPointD"].rotation_euler = (0.0, math.radians(point_d["lat"]), math.radians(point_d["lon"]))
bpy.data.objects["EmptyPointC.001"].location.x = location_CD
bpy.data.objects["EmptyPointD.001"].location.x = location_CD

# set Y rotation on the camera
bpy.data.actions["EmptyCamAction"].fcurves[1].keyframe_points[0].co = (20.0, math.radians(point_a["lat"]))
bpy.data.actions["EmptyCamAction"].fcurves[1].keyframe_points[0].handle_left.y = math.radians(point_a["lat"])
bpy.data.actions["EmptyCamAction"].fcurves[1].keyframe_points[0].handle_right.y = math.radians(point_a["lat"])

bpy.data.actions["EmptyCamAction"].fcurves[1].keyframe_points[1].co = (80.0, math.radians(point_b["lat"]))
bpy.data.actions["EmptyCamAction"].fcurves[1].keyframe_points[1].handle_left.y = math.radians(point_b["lat"])
bpy.data.actions["EmptyCamAction"].fcurves[1].keyframe_points[1].handle_right.y = math.radians(point_b["lat"])

# set Z rotation on the camera
bpy.data.actions["EmptyCamAction"].fcurves[2].keyframe_points[0].co = (20.0, math.radians(point_a["lon_Z"]))
bpy.data.actions["EmptyCamAction"].fcurves[2].keyframe_points[0].handle_left.y = math.radians(point_a["lon_Z"])
bpy.data.actions["EmptyCamAction"].fcurves[2].keyframe_points[0].handle_right.y = math.radians(point_a["lon_Z"])

bpy.data.actions["EmptyCamAction"].fcurves[2].keyframe_points[1].co = (80.0, math.radians(point_b["lon_Z"]))
bpy.data.actions["EmptyCamAction"].fcurves[2].keyframe_points[1].handle_left.y = math.radians(point_b["lon_Z"])
bpy.data.actions["EmptyCamAction"].fcurves[2].keyframe_points[1].handle_right.y = math.radians(point_b["lon_Z"])

# set world texture (i.e. the globe texture)
if params["map_texture"]:
	bpy.data.textures["Texture.002"].image.filepath = params["map_texture"]

# Get font object
font = None
if params["fontname"] != "Bfont":
	# Add font so it's available to Blender
	font = load_font(params["fontname"])
else:
	# Get default font
	font = bpy.data.fonts["Bfont"]

# Modify Text for Departure
text_object = bpy.data.curves["Text"]
text_object.body = params["depart_title"]
text_object.extrude = params["extrude"]
text_object.bevel_depth = params["bevel_depth"]
text_object.size = params["text_size"]
text_object.space_character = params["width"]
text_object.font = font
material_object = bpy.data.materials["Material.001"]
material_object.diffuse_color = params["diffuse_color"]
material_object.specular_color = params["specular_color"]
material_object.specular_intensity = params["specular_intensity"]
material_object.alpha = params["alpha"]

# Modify Text for Arrival
text_object = bpy.data.curves["Text.001"]
text_object.body = params["arrive_title"]
text_object.extrude = params["extrude"]
text_object.bevel_depth = params["bevel_depth"]
text_object.size = params["text_size"]
text_object.space_character = params["width"]
text_object.font = font
material_object = bpy.data.materials["Material.003"]
material_object.diffuse_color = params["diffuse_color"]
material_object.specular_color = params["specular_color"]
material_object.specular_intensity = params["specular_intensity"]
material_object.alpha = params["alpha"]

# Modify the Line Material and Pins
material_object = bpy.data.materials["Material.002"]
material_object.diffuse_color = params["diffuse_color"]
material_object.specular_color = params["specular_color"]
material_object.specular_intensity = params["specular_intensity"]
material_object.alpha = params["alpha"]
material_object = bpy.data.materials["Material.004"]
material_object.diffuse_color = params["diffuse_color"]
material_object.specular_color = params["specular_color"]
material_object.specular_intensity = params["specular_intensity"]
material_object.alpha = params["alpha"]
material_object = bpy.data.materials["Material.005"]
material_object.diffuse_color = params["diffuse_color"]
material_object.specular_color = params["specular_color"]
material_object.specular_intensity = params["specular_intensity"]
material_object.alpha = params["alpha"]

# Set the render options.  It is important that these are set
# to the same values as the current OpenShot project.  These
# params are automatically set by OpenShot
bpy.context.scene.render.filepath = params["output_path"]
bpy.context.scene.render.fps = params["fps"]
#bpy.context.scene.render.quality = params["quality"]
bpy.context.scene.render.file_format = params["file_format"]
bpy.context.scene.render.color_mode = params["color_mode"]
bpy.data.worlds[0].horizon_color = params["horizon_color"]
bpy.context.scene.render.resolution_x = params["resolution_x"]
bpy.context.scene.render.resolution_y = params["resolution_y"]
bpy.context.scene.render.resolution_percentage = params["resolution_percentage"]
bpy.context.scene.frame_start = params["start_frame"]
bpy.context.scene.frame_end = params["end_frame"]

# Render the current animation to the params["output_path"] folder
bpy.ops.render.render(animation=params["animation"])
